Concrete-mixer.



E. W. BRACKENBURY.

CONCRETE MIXER.

APPLIOATION FILED 11017.15, 1911.

Patented Feb. 4, 1913.

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9 QQ W To all whom it may concern:

UNITED STATES rarer orrrc.

ID ABD W- BBAGKEN BU Y, OF MILWAUKEE, WI CO W SS GNQ T- L- fi ITH WPANY M L A KEE, IS N3IN- ooNcRn'rE-MIXEB Specification of Letters ratent,

- Patented. eb- 4, 91.3-

Application filed November 15, 1811. Serial In. 0,387.

Be it known that I, EDWARD W. BRACK- ENBURY, a citizen of the Kingdom of England, residing at Milwaukee, State of Wisconsin, have invented a new and useful Improvement in Concrete-Mixers, of which the following is a full and clear description, reference being had to the accompanying drawing, forming a partv hereof.

My invention relates to improvements in concrete mixers, and it consists of the novel construction, combination and arrangement of parts hereinafter shown, described and claimed.

' In the drawing-Figure 1 shows a mixer drum in elevation, a part being broken away to show a vertical section through some of the blades or buckets. Fig. 2 shows in plan view a section through the drum taken on the broken line a. b. c. d; of Fig. 1, looking in the direction of the arrows. Fig. 3 shows a section through one of the buckets and portions of the head of the drum, taken on the line 6. f. of Fig. 1 and looking in, the direction of the arrow.

Referring to the drawing by reference numerals, 1 is the cylindrical shell of the mixer drum, and 2. 2. are the heads thereof.

3 is the feed opening and 4 the discharge opening in the drum.

. In the interior of the drum a plurality of blades or buckets is provided, each bucket consisting of a blade 5 placed substantially radial of the drum, a lon inclined side 6, and a shorter inclined si e 7. Both sides 6 and 7 and the blade 5' are formed integral preferably, consisting of one sheet of metal out and bent to the requisite form. The extreme edges of the sides are flanged as at 8-and 9 and the bucket is secured in place in the drum by riveting these flanges to the heads 2. The ends of the inclined sides 6 and 7- are so cut that an opening 10 is left between them.

By considering the right hand half of Fig. '2 and correspondin part of Fig. 1 below the line 0. d, it wil be seen that the radial blade 5, the shell of the drum, a

portion of each head 2, and the inclined sides 6 and 7 altogether form a bucket with a wide open top which is in advance as the drum s rotated in the direction of the arrow 11, and the opening 10 on the side of this bucket toward the center of the drum,

with the sides 6 and 7 converging to this opening form a discharge chute for said bucket. This bucket discharge is nearer to the discharge opening 4 of the drum than it is to the feed opening 3 in order to facllitate the discharge from the drum, which drum dlscharge is effected in the ordinary Way by inserting an inclined spout in the opening 4 as is common in non-tilting batch mixers.

In operation the material in the d lifted by the buckets and when th batch is in the drum, the material i diately begins to flow through the conand continually carried from the ends toward the middle of the drum by the inclined sides of the buckets 6 and 7.

What I claim as my invention is- 1. A rotatable mixing drum containing a plurality of tapering scoops, each scoop consisting of a bottom plate and-two side plates substantially at right angles to the bottom plate and having its wider end attached to,

and opening toward the periphery of, the

drum, and its narrow end opening toward the axis of the drum.

2. A rotatable mixing drum containing a plurality 'oftapering, substantially radial scoops, each scoop having its wider endextendingthe length of, and opening toward the periphery of the drum; and its narrow end opening toward the axis of the drum.

3. A rotatable mixingreceptacle having heads in its opposite ends and a shell connecting said heads, and a plurality of scoops in said receptacle, the opposite sides of each scoop being attached to the opposite heads and converging from said attachment toward the open end of the scoop which is toward the axis of the receptacle, the bottom of each scoop connecting the sides thereof and extending from the shell of the receptacle toward its axis. 4

4. A cylindrical mixing receptacle rotatably mounted having concentric feed and discharge openings in the opposite heads thereof, and a plurality of scoop-like partitions in said receptacle, each partition con- 2 1 ,ompse sisting of two inclined sides respectivel ataxis of the drum, and nearer to the dis- 10 tached to the opposite heads of the rum charge end thereof than the feed end.

and converging toward the axis of the drum, and a plate connecting the edges of said sides which follow in the direction of rotation said plate extending substantially radial of the drum from the cylindrical shell thereof, theopening between the coni verging sides being directed toward thei In testimony of which, I hereunto aflix my hand in the presence of two witnesses.

EDWARD W. BRACKENBURY. 

